80 |
80 User Manual
Appendix 1:Installations & Setting Up
This will print one raster for every 9 encoder pulses.
Step 5:Check the Print Performance
Having entered the print width and created a message using the character size and raster from the
calculation, prints must be taken at a variety of normal running speeds to confirm the settings. This must
include the maximum running speed.
Troubleshooting Encoder and Print Width Problems
Important Notes:
1. Never assume that the entered print width value is correct; always go back to the
calculations.
2. Never assume that the line speed is known accurately; try to measure it or estimate it as
you see it on the day. (Refer to the “Line Speeds per Product Frequency” section later in
the manual).
The encoder will only maintain a fixed print width up to the lower of the maximum line speed and the
maximum encoder speed calculated in Step 3. When this speed is exceeded, the printed message
length can increase dramatically and unpredictably. The same effect can be seen if the print width value
is incorrectly calculated or entered. Very often a printer will be set up on line with a shaft encoder, the
pitch factor poorly calculated (if at all) and print samples taken.
Troubleshooting must follow a logical sequence:
1. If the message length measured on the print samples is larger than that calculated in Step
3, then it is possible that the line speed is too high. This can easily be checked:
a) From the SETUP menu, set Shaft Encoder to Off. Note down the original Print Width
setting, then set Print Width to 0.
b) Note the original Print Delay setting. Multiply this by the original Print Width setting.
Enter the new value.
c) Run the line at the same speed and take print samples.
The printer will now be generating rasters at its maximum rate.
(i) If the printed length of the message is still too long, then the line speed is
too high for the printhead/raster being used. No adjustment of the encoder,
gearing, or Print Width will influence this.
(ii) If the printed length of the message is now shorter than required, the original
print width was wrong. It may need to be increased or decreased. Only going
through the calculations will give the correct value to enter. Remember to
check the maximum encoder speed.
Remember to enable the shaft encoder using the SETUP menu and adjust the Print Delay.
2. If the message length measured on the original samples (i.e. with the shaft encoder
enabled and the original Print Width setting) was shorter than that required, then the print
width must be increased. The calculations will give the correct setting; if guessed at the
results could still be unpredictable.
Using the Printer Alarm Output
When there is a print warning or failure, the printer activates a 24 volt external alarm, where fitted.
The Alarm Beacon available from EC-JET is as follows:
Alarm Beacon Single Stage 24V.
The pin connections are as follows:
Pin 1 Alarm Signal
Filling with Ink and Solvent
Switch the printer on and check if the ink or solvent level warning messages are displayed. Fill the
system with ink and solvent as necessary (see “Routine Maintenance”).
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